ZK-MT21 2.1 Channel Bluetooth 5.0 Audio Amplifier Board 50W X 2 +100W Mini Subwoofer Power Amp for DIY Bluetooth Speaker Home Theater

Product Description：Item Type: Bluetooth Power Amplifier BoardMaterial: PCBRadiator Size: Approx. 36x25x10mm /1.42x0.98x0.39inBluetooth Version: 5.0 (Unobstructed,15m/49.2ft)Input Mode: Aux, BluetoothNumber of Channels: 2.1 ChannelInput Sensitivity: 500mVPower Amplifier Chip: Domestic PowerAmplifier ChipAdaptation Speaker: 20-100W, 4-8QMechanism: Anti Reverse Connection,Overheating and Overcurrent, Short CircuitApplicable Power Supply: DC 12~24V 5A orMore (Can Not Connected to 24V Battery Pack)Output Power: Left and Right ChannelPackage Dimensions: 5.16 x 4.41 x 2.05inches; 6.38 ounces / 14 x 11 x 6 cm; 0.2kgPacking list:1 x Bluetooth Power Amplifier Board2 x Cover Plate9 x Screw8 x Copper Column Assembly5 x Knob1 x Screwdriver1 Adapter

• 1. Treble and Bass Adjustment: 2.1 channel, maximum output power 2X50W+100W. By adjusting the high and low frequency knobs, you can make the sound more layered and the bass more shocking
• 2. Two Input Methods: It has two audio input methods: Bluetooth and 3.5mm AUX. Bluetooth 5.0 version, higher transmission efficiency, transmission distance up to 49 feet (no obstruction)
• 3. Protection Function: It has short circuit protection, overcurrent, overheating, and anti-reverse connection protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage
• 4. Applicable: Bluetooth 5.0 power amplifier board with 36x25x10mm / 1.42x0.98x0.39in heatsink, applicable power supply DC12‑24V 5A and (24V battery pack cannot be connected), applicable speakers 20-100W, 4-8 Ω
• 5. Stable Performance: Bluetooth digital power amplifier module features Bluetooth 5.0 with a distance of up to 49 feet (unobstructed). Also, this amplifier board has a 3.5mm AUX sound input